Separation and/or closure wall for a container and methods for assembling containers using such a wall

ABSTRACT

A separation and/or closure wall designed in the first place, to cover the opening of at least a container to retain a substance contained therein for conservation before use, and subsequently to be torn to reveal said opening and release the substance outside said container for use. The separation and/or closure wall has a deformable membrane arranged on the periphery of the opening of the container to cover the same, with a tension which enables its being burst under the effect of a perforation and/or tear, to be retracted over the periphery and completely reveal said opening. The invention also concerns methods for assembling two containers each containing a substance portioned with respect to the other with such a separation and/or closure wall. The invention is applicable to food, pharmaceutical, and dietetic products.

CROSS REFERENCE TO RELATED APPLICATION

[0001] The present application is a national stage of PCT/FR02/02360filed Jul. 5, 2002 and based upon French Application No. 01/08913 filedJul. 5, 2001 under the International Convention.

FIELD OF THE INVENTION

[0002] The present invention relates to adaptations that permitassurance of closure of a packaging, that is, the packaging in a closedvolume of at least one product for the purposes of keeping before itsutilization, followed by the opening of the same packaging at the timeof utilization of the said product under optimum conditions.

[0003] The present invention also concerns double packaging, that is,packaging in two different volumes of two products which are intended tobe in contact for the purposes of mixing at the time of utilization.

DESCRIPTION OF PRIOR ART

[0004] The development of the food market, of chemistry, pharmaceutics,dietetics and cosmetics led to the creation of new products consistingof several substances which must not be mixed until the moment of theirutilization.

[0005] The separation within the two substances to be mixed should beclear to ensure keeping of the products before utilization, notably whenthe mixing of these is possible only just a short time before their use,because of the physicochemical reaction caused by the mixing, as isfrequently the case in the field of pharmaceutics for injectableproducts and pasty products, such as creams and gels or in the field ofmanufacture of certain hardeners of fast-acting glues, or creation ofpaint colors where the volumes of the two paints should each be dosed soas to provide a particular tint after mixing, resulting from the mixingof two paints.

[0006] In the food area, the separation of substances becomes importantand, for several reasons, the main ones of which include:

[0007] esthetic aspect, because the eye of the client is more attractedby a bicolor or multicolor product on a shelf,

[0008] novelty, because the presence of two substances in the samepacket is unusual,

[0009] the taste, because of the fact that the mixture is made in thelast moment, which guarantees the distinction of aromas as well as thepreservation of the taste,

[0010] the possibility for the client to choose a mixture or not, thatis, to begin with one substance and finish with another.

[0011] In order to avoid mixing before consumption, the majority ofmultilayer food products present on the market today use a concept thatis based on the existing difference of viscosity and density between theproduct that constitutes the layers, to prevent mixing them. The factthat this solution is widely used does not guarantee that mixing willnot occur, notably during transportation which, due to poorly dampedshocks, may cause instantaneous and unintended mixing of the twosubstances, thus making the product difficult to market.

[0012] A solution to these problems of migration and mixing ofsubstances constituting the product to be sold is based on a newpackaging concept, that is, double packaging.

[0013] A device for double packaging is described in French Patents Nos.2633250 and 2783804, which propose a packaging made with a homogeneousand tight block superimposing two compartments, one of the containershaving an orifice which is covered on its outside surface in a piercablemanner by an exterior means, with which the said packaging is equipped,the said means of perforation also serving to perforate the separationof the two compartments in order that the two contents can mix. Adisadvantage of this device is that the perforation of the separatingcover does not always provide efficient communication between the twosuperimposed compartments, so that mixing is not provided under goodconditions.

[0014] The double packaging as it exists at the present time may also bein other forms, such as:

[0015] a packet glued to the main container,

[0016] a packet packaged inside the main container,

[0017] a product to be added, located inside the cover.

[0018] The Applicants noted that, although this new concept of doublepackaging solves the problems of migration between the products, itremoves the unity of the product, that is, the “added” packet or sachetis considered by the consumer to be an accessory. As a matter of fact,the consumer frequently loses the “additional” packaging, for variousreasons:

[0019] by negligence,

[0020] because of the fact that an additional opening has to beperformed on an auxiliary packet,

[0021] because of the fact that the utility of this packet is notrecognized and

[0022] because of the lack of unity, the customer does not perceive theimmediate complementarity with the first packaging.

[0023] There are several devices in the prior art that permitelimination of the above disadvantages. But, for example, the device,described and represented in the text of French Patent No. 2507573consists of a two-compartmental container, the two compartments beingseparated by a separation wall that can be perforated by a perforatingdevice placed inside the container. The disadvantage of this device isthat it can be handled only with the aid of a straw, which provides themovement of the perforating device toward the separation wall of the twocompartments. Moreover, the assembling conditions are not evident. As amatter of fact, according to the embodiment illustrated, the twocompartments will be covered separately and then assembled so that theirseparation walls are superimposed and the perforating device providestearing of both.

[0024] The difficulty in double packaging lies in the destruction of theseparation and/or closure wall of the two packagings and in the methodof assembly of these two latter. As a matter of fact, although theconcept itself permits separate filling of the contents, followed bytheir assembly, several problems occur during the performance from thepoint of view of hygiene and from the point of view of maintaining thehygienic conditions to the final assembly.

[0025] Moreover, theoretically, double packaging requires twice as manyassembling operations and twice as many working materials, whichconsiderably increase the cost of the products presented in suchpackages. Thus, for example, the device described by the aforesaidpatent superimposes two equivalent covers.

[0026] Another device of the prior art, described and represented inEuropean Patent No. 0232814 starts from a two-compartment container, thecover of which has a perforating device. The deformation of thecontainer in its totality permits perforation of the separation wall andmixing of the two substances stored separately. The opening of thecontainer is done from the top and does not always remove the tornseparation wall of the container. Moreover, the filling and covering bythe cover under good conditions, notably under conditions accepted forfood products, seems to be difficult to attain in the embodiments thatare represented.

[0027] Another device described and represented in European Patent No.0173547 proposes a container composed of three parts, namely:

[0028] a first principal container filled with a first substance,

[0029] a second container located in the first compartment and closingit, and being supported on the edge of its opening, and

[0030] a cover assuring closure of the second container and perforationof the bottom of the second compartment.

[0031] This concept of the two-compartment system has the disadvantageof perforating the bottom of a compartment and not a cover, whichrequires additional force from the user, as well as much more expensivematerials for the perforating device and for the joints between thefirst and second containers.

[0032] Another device described and represented in U.S. Pat. No.3,695,478 and in European Patent No. 0461693 proposes an elasticallydeformable stopper for the injection syringe, the objective of which isto separate the ampoule from the injection needle of the syringe.Tensioning of the membrane, which forms the upper part of the stopper,here has only the purpose of keeping the orifice formed by theperforation of the needle open during the injection or aspiration intothe ampoule and then closing the said orifice again once the needle wasremoved, in order to assure good tightness.

[0033] Another device described and represented in British Patent No.1,192,817 proposes a packaging for predosed dental amalgam, which hastwo compartments, containing two substances which are intended to bemixed only at the time of use, and which are separated by a membranehaving a fragile or rupture zone which can be torn by means of a tearingdevice, such as an internal plunger, moved by axial sliding of onecompartment in the other. This principle, which merely provides tearingof the membrane, additionally requires the presence of a foreign body(plunger) in one of the compartments, which naturally should be removedfrom the final mixture.

SUMMARY AND DETAILED DESCRIPTION

[0034] Starting from this state of affairs, the Applicants then carriedout research aimed at improving this new concept of double packaging,the research having led to the conception of a new separation and/orclosure wall of a container that permits elimination of thedisadvantages of the existing double packagings cited above, whileassuring separate storage of substances until their mixing before useunder optimal conditions and without risk of migration between the twosubstances.

[0035] The problem that the Applicants proposed to solve in order toattain this objective is based on a separation and/or closure wall,which is capable first of all to cover the opening of at least onecontainer to retain a substance introduced inside it for the purposes ofstorage before utilization and, secondly, to be torn by uncovering thesaid opening and thus releasing the substances out of the cavity of saidcontainer through this opening for the purposes of utilization.

[0036] In order to achieve this, they conceived a separation and/orclosure wall of a container resting on a deformable membrane placedaround the periphery of the opening of the said container to cover thelatter with a tension that would permit it to be burst under the effectof perforation and/or tearing, in order to retract to the periphery ofthe said opening and uncover the aforesaid opening entirely. Thepresence of a deformable membrane tensioned on the periphery of theopening of a container offers great advantages both with regard to theclosing function as well as that of the opening of the container. Infact, due to its great flexibility to deformation, the membrane willprovide better shock resistance to the closed container and because ofits ability to burst under the effect of simple perforation or simplepinching, to retract completely to the periphery of the opening of thecontainer, the same membrane will provide complete uncovering of thesaid opening. It is self-evident that the person skilled in the art willutilize adequately all the physicochemical parameters of the materialemployed for the deformable membrane in order to determine compatibilitywith the substance contained in the cavity of the container that itcloses, and, by using a classical dynamometric study, will determine theability of the membrane to flex and/or to resist shock when undertension and exposed to the effect of shock of blunt objects and/or tothe pressure of the substance contained inside the container with itsimmediate ability to be torn and burst under the effect of the pressureof an object perforating or cutting or pinching by torsion of the saidmembrane. The physical properties of this deformable membrane thus arereminiscent of those of the membrane of a balloon, which, when it isblown up with a gaseous fluid, increases the volume and accepts aflexion when it is compressed with the hands (blunt object), while itbursts when it encounters the thorn of a rosebush (a perforating orcutting object). Another advantage of such a deformable membrane, which,during industrial serial production could be in the form of an extendedfilm according to a known method of manufacture, which will be adjustedand maintained on the periphery of the openings of the juxtaposedcontainers, is to increase the surface of the film to cover the saidopenings, greatly reducing the price of the closure walls thus produced.Another advantage of such a deformable membrane is its adaptability toany profile of the opening and thus to any container presently on themarket.

[0037] It is apparent that, in comparison to other devices of the priorart described above, the means of opening of the periphery of thecontainer is only provided here by the ability of bursting the membrane,which previously provided the closing of the container, a bursting whichcan only be produced by previously placing the same membrane undertension. Thus, we are not dealing here with a tension for maintaining aconstant orifice at the time of passage of a needle and then to closeit, or with a zone of fragilization of a membrane that can be torn witha plunger.

[0038] According to a particularly advantageous characteristic of theinvention, the aforesaid deformable wall separation and/or closuremembrane is made of a pliable material in order to withstand thedeformation under tension more easily, notably the flexion when it istensioned to resist excessive shock to which containers are generallysubjected.

[0039] According to another particularly advantageous characteristic ofthe invention, the aforesaid deformable membrane of the separationand/or closure wall is made of an elastic material in order to withstanda greater deformation under tension and to offer better retractabilityon the periphery of the opening under the effect of tearing, as afunction of the modulus of elasticity of the material used. As indicatedabove, this modulus of elasticity will also be adjusted to otherphysicochemical parameters of the material, selected judiciously topermit the membrane tensioned on the periphery of the opening to resistshocks by blunt objects and/or the pressure of the substance containedinside the container without tearing, while tearing and bursting withlittle flexion under the effect of contact with a cutting or perforatingobject or under the effect of torsion causing pinching, followed bytearing of the said membrane, or by combination of these two modes ofbursting of the said membrane.

[0040] According to another particularly advantageous characteristic ofthe invention, the aforesaid deformable wall separation and/or closuremembrane is made of a plastic material which will facilitate putting themembrane in place on the periphery of the opening of the container, andaccepting a deformation under tension and providing hermetic sealing onthe periphery of the opening by packing, gluing or by any otherequivalent technique known to the person skilled in the art.

[0041] According to another particularly advantageous characteristic ofthe invention, the aforesaid deformable wall separation and/or closuremembrane is placed tightly on the periphery of the opening of thecontainer in order to provide absolute separation between the inside andthe outside of the closed container by the said membrane. Thisarrangement allows filling the container under vacuum.

[0042] According to a first embodiment of the invention, the aforesaiddeformable wall separation and/or closure membrane is tensioned directlyon the periphery of the opening of the said container. This embodimentwill be particularly suitable when the production chain in which themembrane is put in place will lay out the containers. This case, whichwill surely be the most frequently used for reasons of economy, couldalso be used for containers filled with substance, as well as for emptycontainers, the filling of which in a filling unit different from theunit that places the membrane, will subsequently occur through anotheropening, which will be closed classically by a cap or a cover that canbe sealed on its periphery.

[0043] According to a second embodiment of the invention, the aforesaiddeformable wall separation and/or closure membrane is tensioned on asupport placed on the periphery of the opening of the said container.This second embodiment will be particularly suitable when the productionchain that provides the placement of the membrane will not have thecontainers, that is, when the support with its extended membrane will beinstalled on the periphery of the opening of the container by aproduction unit, for example, by that which will perform the filling ofthe substance into the cavity of the container.

[0044] As described above, the membrane of the invention finds directapplication in serving as the separation and/or closure wall of acontainer considered as simple and classical packaging of a product tobe seen when presented for sale, such as the packaging most commonlyknown under the name of “blister” packaging, that is, a transparentplastic cover glued onto a tearable support, in the form in which somemerchandise is sold, such as tablets, gel caps or lyophilized ornonlyophilized pharmaceutical products, presented in the form of plateswith several recesses in which the said products can be contained by themembrane of the invention.

[0045] However, the first application of the new concept of separationand/or closure wall of the present invention, which lead to the mainresearch work of the Applicants and the double packaging, that is, thepackaging of several substances in different volumes which are intendedto come in contact for the purposes of mixing at the time of theirutilization. To satisfy this need, the Applicants thus improvised,according to the fundamental concept of the invention, the arrangementof a deformable membrane, tensioned between at least two volumes ofsubstance, in order to form first of all a physical barrier between thesaid volumes of two substances delimited by the said membrane in atleast one container for the purposes of isolated storage of substances,and, secondly, to put into communication the said volumes by tearing andbursting of the tensioned membrane in order to provide good flow ofsubstances between the two volumes, mixing of the said two substancesfor the purpose of utilization of the latter.

[0046] The utilization of a separation and/or closure wall based on theutilization of a deformable membrane installed under tension, whichbursts under the effect of contact with a perforating or cutting objector by tearing under the effect of torsion or by the combination of thesetwo modes of bursting of the said membrane, permits considerableimprovement of the concept of double packaging indicated above, with, onthe one hand, the two volumes being physically separated beforeutilization so that the double packaging will be maintained, avoidingany problem of migration between the two substances, and, on the otherhand, putting the two volumes in free communication after bursting ofthe membrane, to produce the mixture correctly. Advantageously, incombination with tight attachment of this membrane on one of thecontainers, it permits filling this container under vacuum and alsoaspiration of the other substance, which will greatly facilitate themixing operation of the two substances. Moreover, the techniques ofassembling or the creation of the compartments can be adapted to anyproduction unit, whether or not the operation of placement of themembranes takes place after or before the filling operation of thecontainers or whether or not the two units of placement and filling ofthe containers are separate.

[0047] Thus, a first embodiment of the assembly of the two containersconsists of the following:

[0048] tensioning a deformable membrane according to the invention onthe periphery of the opening of a first container in one placement unit,

[0049] filling the first container with a first substance and closingthe said first container, for example, by means of a sealable cover, ina filling unit which can be separated from the placement unit,

[0050] filling the second container with a second substance via afilling opening, in a filling unit which can be the same or differentfrom the filling unit of the first container,

[0051] and assembling the two containers by sealing, clipping orscrewing the first container on the second container by joining theperipheries of the openings of the container in such a way that the twocontainers are separated, via the separation wall which forms theaforesaid closing membrane with their openings facing one another.

[0052] This first mode of assembly, which is carried out bysuperimposing two containers joined at their openings, the volumes ofwhich are partitioned by the tensioned membrane, permits, among otherthings, to be able to differentiate the membrane placement unit from thecontainer filling unit, because frequently the first unit hasspecialized packaging production chains and the second unit hasspecialized substance filling production chains. Moreover, if thesubstances used must be produced in different units, this first mode ofassembly finds particularly dedicated application to the extent that itcan allow the manufacture of the containers in one unit, the placementof the deformable membrane in another unit, the filling of the firstcontainer in one unit and the filling of the second container in anotherunit. Thus, for example, in the food area, one of the containers can besubcontracted, thus giving the possibility to a business specializing indairy products to provide products with double packaging without havingto diversify its production, by subcontracting one of the containers toa business specializing in the manufacture of the product to be added,which is different from the dairy product.

[0053] A second mode of assembly of two containers consists in thefollowing:

[0054] filling the first container with a first substance via a fillingopening, in a first filling unit,

[0055] closing the aforesaid filling opening of the first container bytensioning the said wall separation and/or closure membrane on theperiphery of the filling opening, in a placement unit which can beintegrated with the first filling unit,

[0056] filling the second container with a second substance via afilling opening, in a filling unit which can be the same or differentfrom the first filling unit,

[0057] and assembling the two containers by sealing, clipping orscrewing of the first container onto the second container by joining theperipheries of the two filling openings of the two containers so thatthe two containers are separated via the separation wall, which formsthe aforesaid closing membrane, with their openings facing one another.

[0058] This second mode of assembly permits control of the deformablemembrane placing unit and the container filling units in the sameproduction chain.

[0059] A third mode of assembly of assembly of the two containersconsists of:

[0060] tensioning the aforesaid deformable wall separation and/orclosure membrane on the periphery of the opening of the first container,in a placement unit,

[0061] filling the second container with a second substance via an inletopening, in a first filling unit which can be different from theplacement unit,

[0062] assembling the two containers by hermetic engagement of the firstcontainer in the inlet opening of the second container by first placingthe membrane inside the second container so that the two contents areonly separated by the said closure membrane,

[0063] filling the first container with a first substance in a secondfilling unit which can be the same as or different from the firstfilling unit,

[0064] and closing the openings of the two containers simultaneously.

[0065] This third mode of assembly offers the same possibilities asthose of the first mode of assembly with respect to the placement andfilling units. However, as that which was recalled above in EuropeanPatent No. 0173547, it proposes to assemble the containers differentlyby providing to lodge the first in the second by closing it andsupporting it on the edge of its opening, for example, with a cover thatconcomitantly assures hermetic sealing of the two containers. This modeof assembly thus avoids assembly by sealing of the two containers at themembrane.

[0066] A fourth mode of assembly of the two containers consists of:

[0067] filling the first container with a first substance via a fillingopening, in a first filling unit,

[0068] closing the aforesaid filling opening of the first container bytensioning the aforesaid deformable membrane of the separation and/orclosure wall on the periphery of the filling opening, in a placementunit which can be integrated with the first filling unit,

[0069] filling the second container with a second substance via afilling opening, in a second filling unit which can be the same as ordifferent from the first filling unit,

[0070] assembling the two containers by hermetic engagement of the firstcontainer in the filling opening of the second container by firstplacing the membrane inside the second container so that the twocontainers are separated only by the aforesaid closure membrane.

[0071] This fourth mode of assembly offers the same possibilities ofthose of the second mode of assembly with respect to the placement andfilling units and the same possibilities as those of the third mode ofassembly with respect to the actual joining of the two containers.

[0072] A fifth mode of assembly concerning a single container consistsof the following:

[0073] tensioning the aforesaid deformable wall separation and/orclosure membrane on a support, in a placement unit,

[0074] filling the first compartment of the container with a firstsubstance via the filling opening, in a first filling unit which can bedifferent from the placement unit,

[0075] positioning the said support with the tensioned membrane, on thecontours of an internal shoulder of the container, via the aforesaidfilling opening,

[0076] filling the second compartment located on the other side of themembrane of the container with a second substance via the said fillingopening, in a second filling unit which can be the same as or differentfrom the first filling unit,

[0077] and closing the aforesaid filling opening of the container.

[0078] This fifth mode of assembly, which applies more precisely to acontainer which has a bottom and a filling opening, permits thepartitioning of one container into one or several compartments accordingto the number of supports installed with the placement and filling unitswhich can be the same or different.

[0079] A sixth mode of assembly concerning a single container consistsof the following:

[0080] tensioning the aforesaid deformable membrane of the separationand/or closure wall on a support, in a placement unit,

[0081] positioning the said support with the tensioned membrane on thecontours of an internal shoulder of the container,

[0082] filling the first compartment of the container with a firstsubstance via the first filling opening, in a first filling unit whichcan be different from the placement unit,

[0083] filling the second compartment located on the other side of themembrane of the container with a second substance via the second fillingopening in a second filling unit, which can be the same as or differentfrom the first filling unit,

[0084] and closing the two filling openings of the two compartments ofthe aforesaid container.

[0085] This sixth mode of assembly differs from the fifth in that itapplies to a container having two opposite filling openings.

[0086] It is understood that the separation and/or closure wall and themodes of assembly of the containers, which were described above, weremade in view of a disclosure rather than a limitation, and their purposeis to underline the most elementary expression of the fundamentalconcept of the invention, which is based on the original utilization ofa tensioned deformable membrane on the periphery of an opening toprovide the closure of a cavity of a container. This is why the means ofbursting the membrane with a perforating or cutting organ or by torsionof the latter to produce pinching, triggered by a manual action of theuser/consumer was not described in the present Description because it iswithout direct implication on the concept of the invention. The methodof bursting of the membrane could be carried out easily depending on themethod of assembly used. It can be obtained with the aid of aperforating object, such as described in numerous patents of the priorart, such as one lodged inside of one of the containers or one locatedoutside or between the two containers or one formed by the wall of oneof the containers so that a supplementary device is not added to theassembly of the two containers. Another method of bursting of themembrane will be obtained without a piercing object by simple increaseof the tension of the membrane under the effect of accentuated pressingof the upper packaging on the lower packaging or under the effect ofturning the upper container in the lower packaging. In this case, thereis torsion of the membrane, generating an increase of the tension of themembrane, in combination with a pinching phenomenon, leading to tearingof the latter. The clipping or torsional phenomenon can be combined withthe presence of a perforating object placed inside one of thecompartments and being attached to the wall of these latter. Similarly,the membrane could be made from a single or composite material and/or ofa monolamellar or multilamellar material and/or with incorporation or noincorporation of an insulating substance, such as aluminum, teflon orsimilar, and/or with the two faces treated to be compatible with the twomedia with which they are in contact. This same membrane could beselective toward gases in contact with it, allowing them to pass throughor not, such as nitrogen, oxygen or carbon dioxide, thus permittingbetter preservation of the product contained in one or the othercompartments, depending on the membrane used.

[0087] As in the food area, double packaging is also applicable in thepharmaceutical area, notably in the case of syringes with doublecompartment in which a first substance is contained in the body of thesyringe and the second substance is contained in that of the piston, thelatter being closed by a membrane of the invention placed in contactwith the first substance, so that the said membrane serves the purposeas a separation wall between the two substances which can be either twoliquids or a powder and a liquid. Placement of the two substances incontact is obtained by simple pressing on the piston, thus resulting ina bursting of the membrane with the aid of a perforating obstacle placedinside the body of the syringe that can be attached to or not attachedto the latter or by turning of the piston in the body of the syringe,thus generating torsion of the membrane, resulting in its rupture.

1-18 (cancelled)
 19. A separation wall for a packaging having at leasttwo compartments, intended, firstly, to cover the opening of at leastone said compartment to hold a substance introduced therein for thepurpose of conservation before utilization, and, secondly, to be torn touncover the said opening and to release the substance from saidcompartment into the second compartment for the purposes of utilization,wherein said separation wall consists of a deformable membrane, arrangedunder tension on the periphery of the opening of said compartment tocover the latter, which permits it to be burst under the effect ofperforation or tearing, to be retracted onto the periphery of the saidopening and to uncover said opening entirely, as the membrane of aballoon, which, when it is blown up with a gaseous fluid, increases involume and accepts flexing when it is compressed with a hand or bluntobject, while it bursts when it encounters the thorn of a rosebush orother piercing or cutting object.
 20. The separation wall according toclaim 19, wherein said deformable membrane of the separation wall isarranged tightly on the periphery of the opening of the saidcompartments.
 21. The separation wall according to claim 19, whereinsaid deformable membrane of the separation wall is made of a pliablematerial.
 22. The separation wall according to claim 19, wherein saiddeformable membrane of the separation wall is made of an elastic and/orplastic material.
 23. The separation wall according to claim 19, whereinsaid deformable membrane of the separation wall is made of a singlematerial.
 24. The separation wall according to claim 19, wherein saiddeformable membrane of the separation wall is made of a compositematerial.
 25. The separation wall according to claim 19, wherein saiddeformable membrane of the separation wall is made of a monolamellar ormultilamellar material.
 26. The separation wall according to claim 19,wherein said deformable membrane of the separation wall is made of amaterial containing an insulating substance.
 27. The separation wallaccording to claim 19, wherein said deformable membrane of theseparation wall is made of a material which has a selectivity to gases.28. The separation wall according to claim 19, wherein said deformablemembrane of the separation wall is tensioned directly on the peripheryof the opening of the compartments.
 29. The separation wall according toclaim 19, wherein said deformable membrane of the separation wall istensioned on a support mounted on the periphery of the opening of thecompartments.
 30. The separation wall according to claim 19, whereinsaid deformable membrane of the separation wall is arranged undertension between at least two volumes of substances, in order to form,firstly, a physical barrier between the volumes of the said two volumesof substances delimited by the said membrane in at least one compartmentfor the purpose of isolated storage of the substances, and, secondly, bytearing and bursting of the tensioned membrane with a perforating and/orcutting object or by pinching under the effect of torsion of the latter,a means of placing in communication the said volumes to assure themixing of the said two substances.
 31. A method of assembling at leasttwo compartments, each containing a substance, wherein said substancesare partitioned from one another by a separation wall according to claim30, said method comprising: tensioning said deformable membrane of theseparation wall on the periphery of the opening of a first compartment,filling the first compartment with a first substance and closing thefirst compartment, filling a second compartment with a second substancevia a filling opening, and assembling the two compartments by sealing,clipping or screwing of the first compartment onto the secondcompartment by bonding the peripheries of the openings of the twocompartments, so that the two compartments are separated with theiropenings facing one another via the closure wall formed by the aforesaidseparation membrane.
 32. A method of assembling at least twocompartments, each containing a substance partitioned from one anotherby a separation wall according to claim 30, said method comprising:filling a first compartment with a first substance via a fillingopening, closing the filling opening of the first compartment bytensioning the deformable membrane of the separation wall on theperiphery of the filling opening, filling a second compartment with asecond substance via a filling opening, and and assembling the twocompartments by sealing, clipping or screwing of the first compartmentonto the second compartment by bonding together the peripheries of thetwo filling openings of the two compartments in such a way that the twocompartments are separated with their openings facing one another, viathe separation wall formed by the aforesaid closure membrane.
 33. Amethod of assembling at least two compartments, each containing asubstance partitioned from one another by a separation wall according toclaim 30, said method comprising: tensioning the aforesaid deformablemembrane of the separation wall on the periphery of the opening of afirst compartment, filling a second compartment with a second substancevia a filling opening, assembling the two compartments by hermeticengagement of the first compartment in the inlet opening of the secondcompartment by prearranging the membrane in the inside of the secondcompartment so that the two compartments are only separated by theaforesaid closure membrane, filling the first compartment with a firstsubstance, and closing the two compartments.
 34. A method of assemblingat least two compartments, each containing a substance, partitioned fromone another by a separation wall according to claim 30, said methodcomprising: filling a first compartment with a first substance via afilling opening, closing the filling opening of the first compartment bytensioning the deformable membrane of the separation wall on theperiphery of the opening, filling a second compartment with a secondsubstance via a filling opening, and assembling the two compartments byhermetic engagement of the first compartment in the filling opening ofthe second compartment by prearranging the membrane inside of the secondcompartment in such a way that the two compartments are separated onlyby the aforesaid closure membrane.
 35. A method of assembling acompartment having a single filling opening with at least two substancespartitioned from one another by a separation wall according to claim 30,said method comprising: tensioning the deformable membrane of theseparation wall on a support, filling a first compartment of thecompartment with a first substance via the filling opening, positioningthe support with the membrane tensioned on the contours of an internalshoulder of the compartment, via the aforesaid filling opening, fillinga second compartment located on the other side of the membrane of thecompartment, with a second substance via the filling opening, andclosing the filling opening of the compartment.
 36. A method ofassembling a compartment having two opposite filling openings with atleast two substances partitioned from one another by a separation wallaccording to claim 30, said method comprising: tensioning the deformablemembrane of the separation wall on a support, positioning the supportwith the tensioned membrane on the contours of an internal shoulder ofthe compartment, filling a first compartment of the compartment with afirst substance via a first filling opening, filling a secondcompartment located on the other side of the membrane of the compartmentwith a second substance via a second filling opening, and closing thetwo filling openings of the first and second compartments of theaforesaid compartment.